Hi folks,
Can you recommend me a good book about deep knowledge of high voltage, corona discharges, dielectric strength? I'm not able to find good info on the internet about such topics.
Thanks.
Can you recommend me a good book about deep knowledge of high voltage, corona discharges, dielectric strength? I'm not able to find good info on the internet about such topics.
Thanks.
I have some good books back from the BTH library (British Thomson Houston) but I doubt you'll find any in print, or scanned.
This is the best I can find today:
"Advanced Electricity and Magnetism", Frankin and Magnutt (great name right?), The Macmillan Company, 1915.
"Standard Handbook for Electrical Engineers", McGraw-Hill Book Company Inc., 1941.
None of these is a book on Corona alone, nor Tan Delta, Partial Discharge etc, but the latter especially has quite a good level of depth.
I have a feeling that much of what is written (in detail) about these subjects is experimental data, which is quickly assimilated into company IP and remains "tricks of the trade".
Good luck.
This is the best I can find today:
"Advanced Electricity and Magnetism", Frankin and Magnutt (great name right?), The Macmillan Company, 1915.
"Standard Handbook for Electrical Engineers", McGraw-Hill Book Company Inc., 1941.
None of these is a book on Corona alone, nor Tan Delta, Partial Discharge etc, but the latter especially has quite a good level of depth.
I have a feeling that much of what is written (in detail) about these subjects is experimental data, which is quickly assimilated into company IP and remains "tricks of the trade".
Good luck.
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You should look industrial sites. Corona discharge treaters are used on weblines that are using plastic substrates( think seran wrap) that are being printed on. Almost all packaged food products in bags. It functionalizes the surface to allow it to be printed on. Also in packaging overwrap machines using shrink wrap. The corona/plasma field charges the wrap to charge it and hold the wrap closed until it shrinks in oven. I've worked with these technologies in past. Anyway google corona/plasma treater and the equipment manufactures will have base knowlege descriptions on site. Electrodes, power supplys, modulation and energy calcs. Start there.
Freecrowder & 50AE
That is what I was saying, broadly.
Most of the functional knowledge I am aware of, in these areas is obscured (typically) in company procedure, with much of the IP protected.
So you'll mostly find fundamentals in text books, analyses in research papers, but the real meat....that's hard to find.
We use different forms of grading tape to conduct discharge caused by Corona at the nose end of a formed coil, back to the conductor, perform quite high level testing of PD, tanDelta etc, along with much of the industry. But internal standards do not reference much, nor lend the reader anything of much use, outside the test at hand.
Maybe take a look at something like BS EN 60034, which chapter I cant recall.
Quite often, these standards have useful starting points, with relevance to what (I think) you may be looking for.
That is what I was saying, broadly.
Most of the functional knowledge I am aware of, in these areas is obscured (typically) in company procedure, with much of the IP protected.
So you'll mostly find fundamentals in text books, analyses in research papers, but the real meat....that's hard to find.
We use different forms of grading tape to conduct discharge caused by Corona at the nose end of a formed coil, back to the conductor, perform quite high level testing of PD, tanDelta etc, along with much of the industry. But internal standards do not reference much, nor lend the reader anything of much use, outside the test at hand.
Maybe take a look at something like BS EN 60034, which chapter I cant recall.
Quite often, these standards have useful starting points, with relevance to what (I think) you may be looking for.
Many thanks!
This is what I feared - info on this subject would be main know-how secret of companies. It would be a good thing to check on their stuff as possible though.
My main purpose of education is to be aware of the design of high voltage transformers for audio purposes, for tubes working in the 1- 1.5kV range. I know a few basics such as minimizing the voltage gradient between layers as possible, using specific coatings and avoiding sharp surfaces, but this doesn't give me enough courage to pursue this yet.
This is what I feared - info on this subject would be main know-how secret of companies. It would be a good thing to check on their stuff as possible though.
My main purpose of education is to be aware of the design of high voltage transformers for audio purposes, for tubes working in the 1- 1.5kV range. I know a few basics such as minimizing the voltage gradient between layers as possible, using specific coatings and avoiding sharp surfaces, but this doesn't give me enough courage to pursue this yet.
I think Pavel is the expert in this area - he is a design consultant for high voltage switchgear and instrumentation design.
You might look into books targeted at the design of high-power vacuum tube circuits. I could be wrong, but I think Principles of Radar has a section on it, by I don't have my copy here right now.
Another good area to look into might be in academic areas. It's not uncommon for physics experiments to run extremely high voltages. I can't list any off the top of my head, but a fair number of papers about the design of plasma physics experiments discuss this in some form or another.
The most experienced people with this are the very few remaining engineers who specialize in very sensitive high voltage equipment.
Good luck, it's a fascinating topic.
Another good area to look into might be in academic areas. It's not uncommon for physics experiments to run extremely high voltages. I can't list any off the top of my head, but a fair number of papers about the design of plasma physics experiments discuss this in some form or another.
The most experienced people with this are the very few remaining engineers who specialize in very sensitive high voltage equipment.
Good luck, it's a fascinating topic.
It could be mistaken. 😀
Yesterday after searching the net for corona discharge documents, I got lots of Covid19 pop-ups. 😀
I remember my first foray into valves well.
I was ahead of everyone else in my electronics class so asked tutor if I could build a valve guitar pre amp and he said OK.
So got it built powered it up and it did nothing so turned it off and started prodding around and got a huge shock. My tutor laughed and said I needed to discharge smoothing cap before touching the circuit as it was still charged up.
So found the fault and powered it up again, still not working.
So discharged cap and touched the circuit and got a huge shock again.
Had forgotten to turn it off !
Remarkably that was 40 years ago and I am still alive despite designing valve circuits and SMPS etc
The trick with high V is to use LED's with series resistors to show when things are live or charged up. A few extra pennies for your life is a bargain.